John Logie Baird with a telechrome device, 25 July 1942.

After a serious illness in 1922, John Logie Baird (1888-1946), the television pioneer, devoted himself to experimentation and developed a crude TV apparatus, able to transmit a picture and receive it over a range of a few feet. The first real demonstration was within two attic rooms in Soho, London, in early 1926, and by 1927 he managed to transmit pictures by telephone line from London to Glasgow. The telechrome device was the world's first multi-gun colour television tube.